Investigation of Luminescent Triplet States in Tetranuclear Cu-I Complexes : Thermochromism and Structural Characterization

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dc.contributor.author Boden, Pit
dc.contributor.author Di Martino-Fumo, Patrick
dc.contributor.author Busch, Jasmin M.
dc.contributor.author Rehak, Florian R.
dc.contributor.author Steiger, Sophie
dc.contributor.author Fuhr, Oliver
dc.contributor.author Nieger, Martin
dc.contributor.author Volz, Daniel
dc.contributor.author Klopper, Willem
dc.contributor.author Bräse, Stefan
dc.contributor.author Gerhards, Markus
dc.date.accessioned 2021-06-21T08:06:01Z
dc.date.available 2021-06-21T08:06:01Z
dc.date.issued 2021-03-22
dc.identifier.citation Boden , P , Di Martino-Fumo , P , Busch , J M , Rehak , F R , Steiger , S , Fuhr , O , Nieger , M , Volz , D , Klopper , W , Bräse , S & Gerhards , M 2021 , ' Investigation of Luminescent Triplet States in Tetranuclear Cu-I Complexes : Thermochromism and Structural Characterization ' , Chemistry: A European Journal , vol. 27 , no. 17 , pp. 5439-5452 . https://doi.org/10.1002/chem.202004539
dc.identifier.other PURE: 160474710
dc.identifier.other PURE UUID: e6b3257b-6c8e-463b-ac08-13eaf7f0f651
dc.identifier.other WOS: 000607642800001
dc.identifier.other ORCID: /0000-0003-1677-0109/work/95861655
dc.identifier.uri http://hdl.handle.net/10138/331672
dc.description.abstract To develop new and flexible Cu-I containing luminescent substances, we extend our previous investigations on two metal-centered species to four metal-centered complexes. These complexes could be a basis for designing new organic light-emitting diode (OLED) relevant species. Both the synthesis and in-depth spectroscopic analysis, combined with high-level theoretical calculations are presented on a series of tetranuclear Cu-I complexes with a halide containing Cu4X4 core (X=iodide, bromide or chloride) and two 2-(diphenylphosphino)pyridine bridging ligands with a methyl group in para (4-Me) or ortho (6-Me) position of the pyridine ring. The structure of the electronic ground state is characterized by X-ray diffraction, NMR, and IR spectroscopy with the support of theoretical calculations. In contrast to the para system, the complexes with ortho-substituted bridging ligands show a remarkable and reversible temperature-dependent dual phosphorescence. Here, we combine for the first time the luminescence thermochromism with time-resolved FTIR spectroscopy. Thus, we receive experimental data on the structures of the two triplet states involved in the luminescence thermochromism. The transient IR spectra of the underlying triplet metal/halide-to-ligand charge transfer (M-3/XLCT) and cluster-centered ((CC)-C-3) states were obtained and interpreted by comparison with calculated vibrational spectra. The systematic and significant dependence of the bridging halides was analyzed. en
dc.format.extent 14
dc.language.iso eng
dc.relation.ispartof Chemistry: A European Journal
dc.rights cc_by
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject Cu-I complexes
dc.subject FTIR spectroscopy
dc.subject luminescence
dc.subject theoretical calculations
dc.subject X-ray diffraction
dc.subject COPPER-IODIDE CLUSTERS
dc.subject FLUORESCENCE THERMOCHROMISM
dc.subject EXCITED-STATE
dc.subject EMISSION
dc.subject PHOSPHORESCENCE
dc.subject SPECTROSCOPY
dc.subject DINUCLEAR
dc.subject LIGANDS
dc.subject BLUE
dc.subject 116 Chemical sciences
dc.title Investigation of Luminescent Triplet States in Tetranuclear Cu-I Complexes : Thermochromism and Structural Characterization en
dc.type Article
dc.contributor.organization Department of Chemistry
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1002/chem.202004539
dc.relation.issn 0947-6539
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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